What ESC were you running that is outdated now? All the old 2s stuff will work just fine with 1s so long as you use a booster or a receiver pack. This past October was the 3rd year in a row I ran my Tekin RS at the IIC...all I had to do was update the software with a hotwire. Most of the other brands also offer some sort of software update as well. With software updateable ESCs the need to buy new ones all the time is just about a thing of the past.